const Cache = {

  keyPrev: 'store_',
  //设置缓存(expire为缓存时效)
  set(key, value, expire) {
    let data = {
      expire: expire ? (this.time() + expire) : "",
      value
    }

    if (typeof data === 'object')
      data = JSON.stringify(data);
    try {
      uni.setStorageSync(this.getKey(key), data)
    } catch (e) {
      return false;
    }
  },
  get(key) {
    try {
      let data = uni.getStorageSync(this.getKey(key))
      const {value, expire} = JSON.parse(data)
      if (expire && expire < this.time()) {
        uni.removeStorageSync(this.getKey(key))
        return false;
      } else {
        return value
      }
    } catch (e) {
      return false;
    }
  },
  //获取当前时间
  time() {
    return Math.round(new Date() / 1000);
  },
  remove(key) {
    if (key) uni.removeStorageSync(this.getKey(key))
  },
  getKey(key) {
    return this.keyPrev + key
  }
}

export default Cache;
